SM-F766U1 4 countries Android 17

Samsung Galaxy Z Flip7 F766U1UESDCZJ1 Firmware

Samsung Galaxy Z Flip7 F766U1UESDCZJ1 is an Android 17 firmware for 4 countries, 11 CSC codes. It is the same firmware configured per region and carrier (CSC). Find your country below, verify the file and download for free. Compared with the previous build F766U1UEUCCZIH: bootloader binary raised from C (12) to D (13), so after installing it there is no way back to older builds; security patch 2026-10-05 instead of 2026-09-05. This is the newest build for SM-F766U1.

OS updates guaranteed until: Android 23Security updates until: Jul 31, 2032
Download firmware
8.8/10 (27)3,418 times
Android 17
OS Version
2026-10-08
First release
other regions until 2026-10-10
2026-10-05
Security patch
4
Countries
11
CSC codes
D (13)
Bootloader binary

Bootloader binary D (13). Flashing firmware with a lower binary is usually blocked by Samsung anti-rollback.

All regional downloads

Pick your region (CSC) to download the matching firmware package.

Paste your current build number from Settings > About phone (About tablet) > Software information, or the output of *#1234#.
    2
    MODEM/CP Version: F766U1UESDCZJ1
    ModelRegionCSC VersionBuild DateRelease dateSizeFile nameDownload
    SM-F766U1
    ACG, AIO, ATT, CCT, LRA, TFN, VZW, XAR United States
    CHA, FKR
    		F766U1OYMDCZJ1 2026-10-08 2026-10-22 16.195 GiB
    SM-F766U1_3_20261008101210_ku0pvcuh66_fac.zip
    		Download
    SM-F766U1
    LLA
    		F766U1OWADCZJ1 2026-10-10 2026-10-29 16.245 GiB
    SM-F766U1_3_20261010030140_kjf4sjlohl_fac.zip
    		Download

    No matching downloads

    How to flash F766U1UESDCZJ1

    • F766U1UESDCZJ1 has bootloader binary D (13). Your device must run binary D (13) or lower: it is the 5th character from the end of your current build number.
    • CSC: Use CSC for a clean install, to change the region (CSC code), to downgrade or to repair a device that does not boot.
    • HOME_CSC: Use HOME_CSC to update the same model and region while keeping your data. Back up anyway: a failed update can still require a reset.
    • The Download Mode key combo depends on the model: see all combos.
    Full flashing guide
    Beware: Manually flashing firmwares may brick your device. Use it at your own risk and follow our tutorial steps.

    What's new in F766U1UESDCZJ1

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    Security patch: October 2026

    SMR Oct-2026 fixes 62 vulnerabilities, 9 of them critical. Android Security Bulletin: 45, Samsung Semiconductor: 4, Samsung-specific issues (SVE): 13.

    Most severe Samsung fixes:

    • high Out-of-bounds write in libsmkvextractor.so prior to SMR Oct-2026 Release 1 allows local attackers to execute arbitrary code. (CVE-2026-21114)
    • high Use after free in WSM service prior to SMR Oct-2026 Release 1 allows local attackers to potentially execute arbitrary code with system privilege. (CVE-2026-21120)
    • high Out-of-bounds write in libsamsungtts.so prior to SMR Oct-2026 Release 1 allows local attackers to execute arbitrary code. (CVE-2026-21122)

    All fixes and Galaxy models with this patch

    Rollout of F766U1UESDCZJ1 by region

    First release
    October 22, 2026
    Last region
    October 29, 2026
    Duration
    8 days
    Regions
    11
    1. Day 1 · · 10 regions
      United StatesACGAIOATTCCTLRATFNVZWXARCHAFKR
    2. Day 8 · · 1 region
      LLA

    Device specifications

    • Display diagonal17.3 cm (6.8")
    • Display resolution2520 x 1080 pixels
    • RAM12 GB
    • Rear camera resolution50 MP
    • Rear camera typeDual camera
    • Battery capacity4300 mAh
    • Weight188 g

    Specifications of SM-F766B, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

    Frequently Asked Questions

    F766U1UESDCZJ1 is Android 17 firmware for Samsung Galaxy Z Flip7, released for 4 countries, 11 CSC codes. It includes the 2026-10-05 security patch. Samsung built it on 2026-10-08.

    SMR Oct-2026 fixes 62 vulnerabilities, 9 of them critical. Android Security Bulletin: 45, Samsung Semiconductor: 4, Samsung-specific issues (SVE): 13.

    Yes. F766U1UESDCZJ1 is the newest build for SM-F766U1 on SamFirm. The previous build was F766U1UEUCCZIH.

    Download the package for your region (CSC) and unzip it. In Odin, load each file into the slot with the same name: BL, AP, CP (if the package has one) and CSC, or HOME_CSC to keep your data. Odin checks the built-in checksum of every .tar.md5 file before flashing. The Samsung Galaxy Z Flip7 must be on bootloader binary D (13) or lower.

    This build uses bootloader binary D (13). It can be flashed on a Samsung Galaxy Z Flip7 running binary D (13) or lower; if the device already has a higher binary, Odin stops with "SW REV CHECK FAIL". No other build of this model uses binary D (13).

    Other builds and changelog for Samsung Galaxy Z Flip7

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    One UI 9
    Galaxy AI

    Enhanced Now nudge
    Now nudge provides helpful suggestions in more places throughout your Galaxy experience. In addition to the keyboard, suggestions will now appear in conversation notifications and in a floating button in the bottom right corner of the screen. There are also several new types of suggestions, like entering reservation details or addresses and saving places in Google Maps.

    Focus on someone important
    My FanCam lets you select a person in a video and follow...

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    • The security of your device has been improved.

    • Stability and reliability
    Device behavior has been improved.
    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    Show 10 older builds

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    One UI 8.5
    Visual design

    Fresh new look
    One UI seamlessly integrates into your daily routine by combining immersive visuals with meaningful personalization for a more refined and sophisticated design. Transparent blur effects add depth and make content easier to navigate, while floating elements react organically to your workflow for a more focused experience. Through familiar and intuitive data visualization, One UI delivers a design that feels both personal and relatable, helping you focus...

    • Security
    The device is protected with improved security.

    These changes may vary depending on the model, country, or network operator of the customer environment.

    Model firmware by region